Arc-welding device



Feb. 3. 1925. 7 1,524,907 v w. P. BOVARD ARC WELDING DEVI CE Filed July 19, 1923 AOQ Z I in addition Patented Feb. 3, 1925: i

\ [UNITED STATES PATENT OFFICE.

WILLIAM P. BOVARD, 0F MANSFIELD, 01110, ASSIGNOR TO THE oino BRASS COMPANY, or iLANsEIELn, OHIO, A CORPORATION or NEw JERSEY.

ARC-WELDING DEVICE.

Application filed July 19,

To all whom it may concern:

Be it known that I, WILLIAM P. BovARD, a citizen of the United States of America, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in an Arc-Welding Device, of which the followin is a specification. 7 My invention relates. to rail bonding and has particular reference to that-class of devices known as bond clamps and has particular application to bonds applied by the electric arc. Oneobject of my invention is to provide means for placing the rail :bonds in position upon the rail before and during the welding operation, and another object of my invention is to provide means for initially striking the are used'in the welding operabe tion where the arc is applied through the medium of a metal electrode.

It has been found that where a. metallic electrode is used in connection with electric welding and where this electrode is of copper or a copper base metal, thatthe electrode is liable to stick or freeze to the part to be welded when it is brought in contact with the same, and when this occurs the op eratorv is obliged to move the electrode until the union is ruptured before the electrode can be withdrawn. This is a source of considerable annoyance and waste of time-to the operator.

. My invention overcomes this difliculty by providing means whereby the are can be initially struck between the electrode and the conducting material to which the electrode will not adhere, and after the arc has been formed the electrode and are can be moved over into proper position where weldin is to takeplaice.

y invention resides in the new and novel combination, relation and construction of the parts hereinafter fuily described and disclosed in the accompanying.

In the accompanying drawing Fig. I is a top plan view of twoadjacent rail ends with a bond held in position by my invention.

Fig. 2 is an end view of Fig. 1, but shows the metal electrode used in weldi'ng.

Fig. 3 is a top plan view of one of the h di g m m e s at my in e tion with a 1923. Serial No. 652,506.

portion of the operating and adjusting screw pro ecting therefrom.

Fig. 4 is a sectional view of my invention on the line 44 of Fig. land shows in addit1on the electrode in position for striking the initial arc.

Fig. 5 is a sectional view of Fig. 3 on the line 5-5 and shows the member to which the electrode is contacted in striking the initial are. l 1

In the preferred form of device embodying my invention I employ a frame 1 provided with two bosses 2 threaded to receive the adjusting screws 3. The frame 1 is also provided with over-hanging members 4 to engage the face of the rail opposite that to which the rail bond Bis applied. Secured to each adjusting screw 3 is a holding mem r 5 so secured and related to the screw 3 that each set of members 3 and 5 are adjustable relative to each other about the axis of the screw 3, and each set of members 3 and 5 are m'ovably independent of'each other.

This latter point is of decided value in cases where the adjacent ends of the rail are not in perfect alinement as in thecase of rails which have been in service for some time.

The holding member 5 is provided with a transverse slot 6 shaped to conform to the terminal 7 of the rail bond B so that when the bond is held in position by my improved 'acent'to the transverse slot 6 is a carbon or graphite insert 8. The insert 8, being of carbon or graphite, will not fuseand unite with the fused end ,of the metal electrode 9 and,'therefore, when an arc is struck by contacting the electrode 9 with the insert 8 there is no sticking or freezing of the electrode and the insert and the electrode 9' can then be moved over into position with respect to the terminal 7 of the rail 'bond and the established arc will fall.

I In using my invention the rail bond B is held in position against the rail surface by the operators hand, the holdin device is t pl ed n p s tion. a a ho ng.

ter this operation has been carried out with i respect to both h olding members 5, the bond and device are in position for the operator to begin the'welding operation.

'- The electrical connect ons'used are those commonly known in the welding art in which the. rail bondand clamping device form one electrode of a welding circuitv and the metalelectrode 9 forms the other.

material, the member 8 is, of course, of the same polarity as the rail and .bond. The operator applies the metal. electrode'9 to the carbon or graphite member 8 and then 1 bondterminal withdraws the electrode sufliciently to form an 'arc between the electrode 9 and the member- 8. The operator'then moves the elec-.

trode over into position with respect to the the are following along and proceeds with the welding; If the arc should break during the welding operation tween the electrode 9 and the member 8- and the operator would again strike an arc bethen move the electrode over into welding position. I

It is quite evident that the holding member may be entirely or practically entirely made of graphite or carbon or other refractory conducting material. L

There are, of course, many modifications which may be made to the specific disclosure .metallic electrode is used. 7

given abovewhich would fall within the scope of my invention.

My invention is applicable not only to the positioning of rail bonds, but in connection with the arc welding art in general where a I claim: I 1 A holding devicecomprising a frame, means on the frame toengage a rail, holding means secured to the frame to engage amL hold a rail bond terminal and refractory.

conducting means on the holdingmeans, and electrically connected to the rail. F 2. A'holdingdevice comprising aframe to engage a rail,'holding; means" on the frame to engage and hold a v rail bond terminal, means secured to the holding means to move.

7 the holding means into andout of engage a d electrically connected to therail.

3. A holding device com-prismg a frame,

A holding .means to' engage and hold a rail As the members 5 and 8 are both of conducting ment'with the terminal and refractory conducting means on the holding. means on the holding means and electrically connected thereto, 1

4. A holding device provided with means for holding a refractorymnducting material adjacent to but not inphysical engagement with an article to be welded by the electric we process. v

5. A holding device provided with means for holding a refractory conducting material adjacent to. but not in physical en ement with an article to be weldedby t e electric arc process, said refractory means haying electrical connection with said artic e. v r

6. A holdin device provided with means for holding a nd terminal in'position and for holding a refractory conducting member adjacent the terminal, means to move the holding means. and refracto wards and awa' from the hon terminal and means for hol the said holding means in fixed relation to the bond terminal.

7. A holding device comprising a plurality of independently operating holding means to engage and hold a bond terminal in position, means to move each holding means independently of the other into or and refractory conducting means mounted on each holding means for the purpose de-' scribed. v I a 8. A holdin device comprising a plurality of indepen ently operating metallic hold- .ing means to engage and hold a rail bond position and a refractory conducting memermounted on the said metallic means and member to I out of engagement with thebond terminal a he means for holding a bond terminal in i a means to move the holding means at will into orvout of engagement with the bond terminal.

10. A holding, device provided with a me- "tallic holding means to engage and hold a bond terminal in position, refractory conductingmeans mounted on the holding means and means rotatably secured to the holding -means to maintain the holding means in engagement with-the bond terminal.

11. An article of manufacture comprising a refractory electrical conducting member,

.-rotatable means secured to the refractory member for holdingthe member adjacentto,

but not in engagement with an article to bev welded and means to connect the member to a source of electric power.

In testimony whereof I aflix my signature.

wnipmn P. BOVARD. 

